As Industrial 'Mechs and Support Vehicles are designed primarily for non-combat use, they usually do not include any Fire Control system. These units can be equipped with an Advanced Fire Control/TTS system however. For IndustrialMechs this is a simple swap operation, but Support Vehicles use a version that isn't as compact. The Advanced Fire Control system for Support Vehicles weighs ten percent of the total of all the heavy (non-infantry) weapons mounted on the vehicle. (An Advanced Fire Control system for a Support Vehicle mounting only a Gauss Rifle would weigh 1.5 tons.)[2] A support vehicle may use a less effective form of fire control (known as Basic Fire Control system) that weighs five percent of the total of all non-infantry weapons mounted on the vehicle.[3] This lighter system isn't as capable as the Advanced Fire Control system. (See Game Notes for restrictions.)

The BattleTech Rules call this system Sensors and assume the presence and functionality of this piece of equipment so no bonus is gained. In fact, a +2 Gunnery skill penalty takes effect if either of the criticals are marked off. When both criticals are marked off a BattleMech can no longer fire.

In BattleTech play, a Support Vehicle mounting Advanced Fire Control has no to-hit modifiers. A Support Vehicle using a Basic Fire Control System receives a +1 to-hit penalty. A Support Vehicle that lacks any fire control system receives a +2 to-hit penalty.[5]